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Constitutive equation of compacted graphite iron (GJV450) at high temperature and high strain rate

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Abstract

Compacted graphite iron (CGI) is an ideal material for the cylinder block and cylinder head of diesel engine because of its excellent physical and mechanical properties. At present, the researches on CGI mainly focused on experimental study of machining CGI, there are few studies on the cutting simulation of CGI, especially the high-speed machining simulation of CGI, and the constitutive equation of CGI at high temperature and high strain rate has not been studied. In this paper, the stress-strain relationship under quasi-static condition was obtained by quasi-static tensile test, and the power law constitutive equation of CGI with a grade of GJV450 under the condition of large strain, high strain rate, and high temperature was built by orthogonal cutting experiments and finite element iteration. The established power law constitutive equation was applied to the finite element simulation of the cutting process of CGI, which improves the accuracy of finite element analysis. The chip morphology of CGI and the distribution of plastic strain and temperature in the cutting process were analyzed by finite element simulation.

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Funding

This work is financially supported by National Natural Science Foundation of China (51675312).

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Authors and Affiliations

  1. Center for Advanced Jet Engineering Technologies (CaJET), Key Laboratory of High-efficiency and Clean Mechanical Manufacture (Ministry of Education), National Experimental Teaching Demonstration Center for Mechanical Engineering (Shandong University), School of Mechanical Engineering, Shandong University, Jinan, 250061, China

    Jiahui Niu, Chuanzhen Huang, Rui Su & Hanlian Liu

  2. Dongfang Electric (Guangzhou) Heavy Machinery Co., Ltd., Guangzhou, 511455, China

    Guoyan Jiang

Authors
  1. Jiahui Niu
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  2. Chuanzhen Huang
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  3. Rui Su
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  4. Guoyan Jiang
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  5. Hanlian Liu
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Contributions

Jiahui Niu and Rui Su developed the idea of the study, participated in the design and execution of the experiment and simulation, and drafted the manuscript. Guoyan Jiang and Hanlian Liu helped to design the experiment, and contributed to the acquisition and interpretation of data. Chuanzhen Huang provided critical review and substantially revised the manuscript. All authors read and approved the final manuscript.

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Correspondence to Chuanzhen Huang.

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Niu, J., Huang, C., Su, R. et al. Constitutive equation of compacted graphite iron (GJV450) at high temperature and high strain rate. Int J Adv Manuf Technol 113, 2163–2174 (2021). https://doi.org/10.1007/s00170-020-06513-1

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  • DOI: https://doi.org/10.1007/s00170-020-06513-1

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